diff --git a/packages/aws-appsync/CHANGELOG.md b/packages/aws-appsync/CHANGELOG.md
index a5e0ecc1..42174d4a 100644
--- a/packages/aws-appsync/CHANGELOG.md
+++ b/packages/aws-appsync/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+### vNext
+- Update x-amz-user-agent header [PR#40](https://github.com/awslabs/aws-mobile-appsync-sdk-js/pull/40)
+
 ### 1.0.9
 - Fix AWS_IAM credentials fetching [PR#38](https://github.com/awslabs/aws-mobile-appsync-sdk-js/pull/38)
 - Preserve the observer associated with an existing topic [PR#37](https://github.com/awslabs/aws-mobile-appsync-sdk-js/pull/37)
diff --git a/packages/aws-appsync/src/link/auth-link.js b/packages/aws-appsync/src/link/auth-link.js
index d949683e..ddd0991a 100644
--- a/packages/aws-appsync/src/link/auth-link.js
+++ b/packages/aws-appsync/src/link/auth-link.js
@@ -13,11 +13,13 @@ import { print } from 'graphql/language/printer';
 import aws4 from './signer/signer';
 import * as Url from 'url';
 
-var packageInfo = require("../../package.json");
+import { userAgent } from "../platform";
+
+const packageInfo = require("../../package.json");
 
 const SERVICE = 'appsync';
 const USER_AGENT_HEADER = 'x-amz-user-agent';
-const USER_AGENT = `aws-appsync-sdk-js/${packageInfo.version}`;
+const USER_AGENT = `aws-amplify/${packageInfo.version}${userAgent && ' '}${userAgent}`;
 
 export const AUTH_TYPE = {
     NONE: 'NONE',
diff --git a/packages/aws-appsync/src/platform.js b/packages/aws-appsync/src/platform.js
new file mode 100644
index 00000000..cb528789
--- /dev/null
+++ b/packages/aws-appsync/src/platform.js
@@ -0,0 +1,3 @@
+const userAgent = '';
+
+export { userAgent };
diff --git a/packages/aws-appsync/src/platform.native.js b/packages/aws-appsync/src/platform.native.js
new file mode 100644
index 00000000..51c52c8c
--- /dev/null
+++ b/packages/aws-appsync/src/platform.native.js
@@ -0,0 +1,3 @@
+const userAgent = 'react-native';
+
+export { userAgent };